Chemistry Unit 3 Quiz

Question 1

Atomic size (across period)

Answer 1

A.K.A Atomic radius
Decreases across the period
Why?
# of protons in nucleus increases -> nuclear charge increases
What does this do?
Results in a greater pull on electrons from nucleus, causing atomic size to DECREASE

Question 2

Atomic size (down column)

Answer 2

It increases
Why?
The energy shells that electrons occupy increases
What does this do?
This increases the distance between valence electrons and the nucleus (atomic size therefore increases)

Question 3

Ionization energy

Answer 3

Energy required to remove an electron from an atom

Question 4

Ionization energy (across period)

Answer 4

Increases

Question 5

Ionization energy (down column)

Answer 5

Decreases

Question 6

Electronegativity

Answer 6

Ability of an atom to attract electrons to itself

Question 7

Electronegativity (across period)

Answer 7

Increases

Question 8

Electronegativity (down column)

Answer 8

Decreases